Casing Adhesion, Separation and Damage
Faults in which the casing bonds too tightly, separates from the filling, lifts, blisters or tears away because preparation, stuffing, heating, drying or storage did not suit the casing and product.
Adhesion may be desirable in one style and unwanted in another. The defect is a mismatch between casing behaviour, product structure and the intended finished presentation.
Incorrect soaking, rinsing, tube size, fill pressure or trapped air can prevent uniform contact. Natural, collagen, cellulose and synthetic casings do not share one preparation method.
Rapid heating, fat-out, steam, purge or uneven drying can create a weak interface or local pockets. The casing and filling shrink at different rates.
Temperature cycling, freezing, rough handling and delayed peeling can change adhesion after processing. A sound casing at stuffing may fail later.
Record casing type and lot, preparation, stuffing pressure, onset, location, heat history and package condition. Distinguish cosmetic lift from exposed or contaminated product.
Follow casing-specific directions, remove air, match fill to calibre and manage heat and drying gradients. Trend recurring locations, lots and machines.
References
- https://www.fao.org/fao-who-codexalimentarius/codex-texts/codes-of-practice/en/
- https://www.fao.org/4/x6556e/x6556e00.htm